<?php
abstract class Page{
	public $title="";
	public $data=array();
	public function __construct($title=""){
		$this->$title=$title;
	}
	public function set($key,$val){
		$this->data[$key]=$val;
	}
	public function Display(){
		echo"<html>\n";
		echo"<head>\n";
		echo"<meta charset='utf-8'>\n";
		echo"<link rel='stylesheet' type='text/css' href='css/style.css'>\n";
		echo"<title>" . $this->title."</AAtitle>\n";
		echo"<head>\n";
		echo"<body>\n";
		$this-DisplayHeader();
		$this-DisplayContent();
		$this-DisplayFooter();
		echo "</body>\n";
		echo "</html>";
	}
	public function DisplayHeader(){
		echo"<header>\n";
		echo"<h1>".$this->title."</h1>\n";
		echo"</header>\n"
	}
	public function DisplayFooter(){
		date_default_timezone_set("Asia/Shanghai");
		echo"<footer>\n";
		echo"<p>".date("Y-m-d h:i:s a",time())."</p>\n";
		echo"</footer>\n"
	}
	public abstract function DisplayContent();
}
?>